1)

The value of cos 0°. cos 1°. cos 2°. cos 3 . cos 89° . cos 90° is

Class 10 Maths

A)

0

B)

1

C)

2

D)

3

E)

4

2)

If x tan 45° sin 30° = cos 30° tan 30°, then x is equal to

Class 10 Maths

A)

0

B)

1

C)

2

D)

3

E)

4

3)

If x and y are complementary angles, then

Class 10 Maths

A)

sin x = sin y

B)

tan x = tan y

C)

cos x = cos y

D)

sec x = cosec y

4)

sin 2B = 2 sin B is true when B is equal to

Class 10 Maths

A)

02°

B)

20°

C)

0°

D)

10°

5)

 If A and (2A – 45°) are acute angles such that sin A = cos (2A – 45°), then tan A is equal to

Class 10 Maths

A)

1

B)

2

C)

3

D)

4

6)

If y sin 45° cos 45° = tan2 45° – cos2 30°, then y = …

Class 10 Maths

A)

\(1 \over 2\)

B)

\(1 \over 21\)

C)

\(10 \over 2\)

D)

45

7)

What is the minimum value of sin A, 0 ≤ A ≤ 90°

Class 10 Maths

A)

0

B)

1

C)

2

D)

3

8)

What is the minimum value of cos θ, 0 ≤ θ ≤ 90°

Class 10 Maths

A)

0

B)

1

C)

2

D)

3

E)

4

9)

Ratios of sides of a right triangle with respect to its acute angles are known as

Class 10 Maths

A)

trigonometric ratios of the angles

B)

trigonometry

C)

trigonometric identities

D)

none of these